September 15th, 2019

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Endometriosis Found in an Isolated Paraaortic Lymph Node: A Case Report
Authors:  Chi-Yuan Liao, M.D., Fuh-Jinn Luo, M.D., and Hsin-Wen Huang, M.D.
BACKGROUND: Literature reviews revealed that endometriosis can rarely occur in the lymph nodes, particularly in the locoregional lymph nodes. Even more rarely is this condition found in the distant paraaortic node. Here we report a case of paraaortic node endometriosis. We present the radiographic findings and discuss its mimicking malignant behavior.

CASE: A 45-year-old woman presented with intermittent abdominal pain of 3 months’ duration. Ultrasonography and abdominal CT revealed right solid and left cystic mass with ascites. A 4.5×2.2×1.5 cm lymph node was found on the lower abdominal aorta. The patient underwent bilateral salpingo-oophorectomy and paraaortic lymph node resection with the pathological report of serous cystadenoma and endometriosis in the lymph node.

CONCLUSION: We report the second reported case of endometriosis in paraaortic lymph node and provide a review of the literature. This report further supports that endometriosis can metastasize via the lymphatic system, and this perplexing benign metastasis may provide the key for further investigation of normal and abnormal cellular growth and dissemination in the future.
Keywords:  biological behavior, endometriosis, lymph node, metastasis
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